JPH06225203A - Television camera device - Google Patents

Abstract

PURPOSE:To freely select a VTR switch and an RET switch by freely switching two switches provided on a zoom demand transmitting a photographing operation signal to a photographing system to the VTR switch and the RET switch. CONSTITUTION:A VTR/RET(V/R) change-over sliding switch 22, a V/R indication lamp 23 and a V/R sharing switch 24 are provided in parallel or the surface of a zoom demand main body 21. A V/R sharing switch 25 is provided at the lower surface of the zoom demand main body 21. When the V/R sharing switch 24 is set to be the VTR switch and the V/R sharing switch 25 to the RET switch at the time of use, a photographer slides the V/R change-over sliding switch 22 in the direction of a switch 22A. When the V/R sharing switch 24 is set to be the RET switch and the V/R sharing switch 25 to be the VTR switch, a cameraman slides the V/R change-over sliding switch 22 in the direction of a switch 22B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera device used for broadcasting, observation equipment and the like.

[0002]

2. Description of the Related Art (b) Conventionally, the main purpose of the handheld RB camera lens for broadcasting is to use the camera while holding it on the shoulder when collecting data. It has a lens grip for driving. Further, this grip is provided with a VTR switch for a photographer to take a picture, and a RET switch for displaying an image in the air or another camera image on the viewfinder of his or her camera. Like a large camera, such a lens may be fixed to a tripod and used. In this case, in order to perform zoom and focus operations at a position away from the camera, zoom demand and focus demand for remote operation are required. Is used. FIG. 21 is a side view of the zoom demand 1, in which the VTR switch 2 and the RET switch 3 are provided.
Are provided independently.

(B) In a television camera, when taking a picture, the type of light source is selected by appropriately selecting a filter that meets the shooting conditions by a filter disk manually or electrically and inserting it in the optical path of the shooting system. It reproduces good colors independently. Then, in the conventional filter disk device, when a predetermined filter is mounted in the optical path, an asynchronous logic circuit using a combinational circuit of logic gates determines the direction in which the rotation distance of the conventional filter disk becomes the shortest. Then, the filter disc is rotated in this direction. Further, by using the asynchronous logic circuit at the same time, the clock pulse is input to the image processing circuit on the camera side to prevent the deterioration of the image quality.

FIG. 22 is a drive control circuit diagram of a conventional example.
The sensor unit 6 detects the position of the filter disc,
The position signal S1 is output to the latch circuit section 7 and the coincidence signal generation circuit 8. Further, the latch circuit section 7 holds the initial position signal S2 of the filter disk and outputs it to the shortest distance rotation direction signal generating circuit 9 having a circuit configuration as shown in FIG. Also,
The connector 10 outputs the command signal S3 from the television camera to the coincidence signal generation circuit 8 and the shortest distance rotation direction generation circuit 9.

Here, the shortest distance rotation direction generation circuit 9 determines the shortest distance direction when the filter disk is rotated to a predetermined position from the initial position signal S2 and the command signal S3, and the analog switches 11 and 12 and the amplifier. The filter disk is rotated in the shortest distance direction from the motor 14 via the motors 13 and 15. In addition, the coincidence signal generation circuit 8 uses the position signal S1.
And the command signal S3 are compared, and if they match, the match signal S4
Is output to the analog switch 12, and the rotation of the filter disk is stopped.

As described above, when the command signal S3 is input to the connector 10, the filter disk rotates in the shortest distance direction, and when the filter designated by the command signal S1 moves to the optical axis, the filter disk is stopped. Is configured to.

(C) When the position of the lens is initially set, such as when the power of the camera lens is turned on, the position of the lens is indefinite, and therefore the optical origin must be set.
At that time, the origin is found using the Z phase of the position sensor, which is an incremental encoder.
When the phase is detected, the Z phase is detected by driving the lens in a predetermined direction, moving to the end portion, and then driving in the opposite direction.

(D) In a conventional color television camera or the like, one or more filter discs containing various filters such as a color temperature conversion filter used at the time of photographing are in a filter disc device which is a part of the photographing system. It is provided in. By appropriately selecting a filter suitable for the photographing condition from the filter disc manually or electrically, and mounting it on the photographing system, the photographing condition is optimized.

FIG. 24 is a front view of a filter disk device in which two conventional filter disks are driven by a DC motor,
FIG. 25 is a side view showing the filter disks 15a, 15
b are provided with filters 16a to 16d for color temperature conversion and the like, and DC motors 17a and 17b in which gearheads for reduction are incorporated at the edges of the filter disks 15a and 15b.
Is provided. Also, the filter disks 15a, 1
The potentiometers 19a and 19b are provided at other positions on the edge of the gear 5b through the two-stage gears 18a and 18b, and the shafts of the potentiometers 19a and 19b have gears 20a and 2b.
0b is provided.

When a filter position command signal is input from the filter disk drive circuit, a preset voltage difference is read and the motors 17a and 17b are energized, and when a desired filter is placed on the optical axis, The potentiometers 19a and 19b are configured to output a command to end energization.

Further, as a drive source in an electrically driven filter disk device, a direct current motor as shown in FIG. 24 is generally used, but a ring-shaped drive disclosed in Japanese Patent Laid-Open No. 305076/1990 is used. A device using an ultrasonic motor has also been proposed.

(E) In the conventional zoom lens, since the variable power lens group and the correction lens group are mechanically linked,
Adjustment of the lens position such as flange back is performed mechanically. Therefore, it is not necessary to change the gain value between normal use and adjustment.

In recent years, the demand for higher performance of zoom lenses has made it necessary to control the lens groups with higher precision. For this purpose, unlike the conventional one, a zoom lens of a system in which the variable power lens group and the correction lens group are independently moved on the optical axis has been devised. In such a type of zoom lens, adjustment of flange back and the like is electrically performed, which is advantageous because it leads to reduction in size and weight of the entire zoom lens, but it is necessary to control a minute position. Since this minute position control is greatly affected by mechanical influences such as dead zones and friction of the drive actuator, it is generally necessary to increase the gain in the control unit as much as possible and reduce the mechanical influence.

[0014]

(A) However, in (A) of the conventional example, the VTR switch 2 and the RET switch are different depending on the size of the hand and the operation frequency of the zoom demand 1 depending on the cameraman. There are many requests to reverse the position of 3. For this purpose, the VTR switch 2 and R which are set as standard in the zoom demand 1 are used.
There are the following problems when operating the ET switch 3.

(1) Even if the frequency of use of the VTR switch 2 and the RET switch 3 changes depending on the contents of photography, their positions cannot be exchanged. (2) Two switches cannot be selected depending on the photographer's personal preference.

(3) It is not possible to make a selection depending on the gripping method that changes depending on the mounting method of the zoom demand 1.

(B) In (B) of the conventional example, the number of types of filters formed on the filter disc tends to increase from four types to five types as the number of functions of the television camera increases, and thus the same type. In many cases, it is necessary to replace the camera of 4 with a filter of 5 filters. In the drive control circuit shown in the conventional example of FIG. 22, when the filter disk is replaced with one having four disks, the circuit for changing the shortest distance rotation direction signal and the accompanying increase in the number of gates is changed, It is necessary to provide drive circuits for two types of drive amplifiers, one for a four-element configuration and the other for a five-element configuration, and the drive circuit fixed to a part of the camera housing needs to be replaced. Has become. Further, if the disk drive circuit is shared by the drive amplifiers in both cases, the shortest distance rotation direction signal generation circuit 9 of the drive circuit becomes complicated, a large space is required on the substrate, and a large mounting space in the camera is occupied. Therefore, it is an obstacle to miniaturization.

(C) In the conventional example (C), there is a problem in that the Z-phase may be driven in a direction opposite to that in which the Z-phase is present, and the origin cannot be found at high speed.

(D) In (d) of the conventional example, since the rated rotation speed of the DC motors 17a and 17b is high in driving from the DC motor, the desired rotation speed cannot be obtained only by the voltage operation, and the speed is reduced. Gearheads are needed. For this reason, the DC motors 17a and 17b themselves are increased in size and weight, and the operating noise due to the gear train is also a serious problem.
Further, in the drive by the ring-shaped ultrasonic motor, the gear train can be omitted because it can be directly installed on the filter disks 15a and 15b, but in the ring-shaped ultrasonic motor, the piezoelectric element, the stator and the rotor necessary for the ultrasonic driving are Placed on the filter disc, the thickness of the filter disc increases.

Therefore, it is difficult to install in a photographing system such as a color television camera having a space-saving optical arrangement as is used today. In particular, in a filter disc device having two filter discs, it is practically impossible to arrange a filter disc thicker than the current one.

(E) In (e) of the conventional example, if the gain of the control section is increased, the stability of the system is impaired due to the influence of the mechanical resonance point, so in normal use, the gain of the control section is unnecessarily increased. There is a problem that the value cannot be raised.

A first object of the present invention is to provide a television camera device in which a VTR switch and a RET switch can be freely selected.

A second object of the present invention is to provide a television camera device in which the filter disk can be easily replaced with one having four disks.

A third object of the present invention is to provide a television camera device which enables high-speed origin search of the lens.

A fourth object of the present invention is to provide a television camera device which reduces the operating noise due to the gear train and at the same time achieves a reduction in size and weight.

A fifth object of the present invention is to provide a television camera device capable of fine position control during adjustment while maintaining system stability during normal use.

[0027]

A television camera device according to a first aspect of the present invention for achieving the above object is a VTR switch, comprising two switches provided on a zoom demand for sending a shooting operation signal to a shooting system. The feature is that both the RET switch and the RET switch can be switched freely.

In the television camera device according to the second invention, a filter disc having a plurality of filters is provided in a part of the photographing system, and a predetermined filter is inserted into the optical path of the photographing system by rotating the filter disc. It is characterized in that it has a filter disk device, the shortest distance direction discriminating circuit is an asynchronous logic circuit using a ROMIC, and the predetermined filter is rotated in the shortest distance direction and mounted in the optical path.

A television camera device according to a third aspect of the invention includes a lens system having a plurality of independently moving lens groups or a plurality of lens groups independently moving by focusing or zooming, and detects the position of the lens. A lens position detecting unit, a lens position reference unit that is combined with the lens position detecting unit and indicates a dividing point of the lens position detecting unit, and the lens position reference unit is divided to detect each of them, and the lens position reference unit And a lens position reference determining means for determining the position of the means.

In the television camera device according to the fourth invention, one or more filter discs having a plurality of filters are provided in a part of the photographing system, and a predetermined filter is provided in the optical path of the photographing system by rotating the filter disc. It is characterized in that a filter disk device for inserting and removing is provided, and a cylindrical ultrasonic motor or a stepping motor is used as a drive source of the filter disk device.

A television camera device according to a fifth aspect of the present invention has a variable power lens group and a correction lens group for correcting the image plane variation caused by the movement of the variable power lens group, each having an independent control section and drive section. Is provided with a zoom lens for performing variable magnification by arbitrarily moving on the optical axis, and the gain of the control unit can be set from the outside.

[0032]

The television camera device according to the first aspect of the present invention having the above-described configuration has two switches provided on the zoom demand that can be freely selected as both the VTR switch and the RET switch, thereby improving the operating performance. improves.

In the television camera device according to the second aspect of the invention, an asynchronous logic circuit using a ROMIC is used as the shortest distance direction discriminating circuit, and a predetermined filter is rotated at the shortest distance and mounted in the optical path. The specification of the filter disk can be changed.

In the television camera device according to the third aspect of the present invention, the lens position reference determining means drives the lens by a distance beyond the allowable range of the assembly error, and when the lens position reference means is detected within this distance, the lens is driven. By stopping, the direction of the lens position reference means is always detected accurately.

In the television camera device according to the fourth aspect of the present invention, the operating noise due to the gear train is reduced by driving the filter disc device with the cylindrical ultrasonic motor and detecting the position of the filter disc with the pulse encoder.

In the television camera device according to the fifth aspect of the present invention, the gain of the control section is changed between the time of using the normal zoom lens and the time of adjustment, so that the system stability during normal use is maintained and the minute amount during adjustment is maintained. Enables position control.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a plan view of the first embodiment, and FIG. 2 is a side view showing a zoom demand body 21. The VTR / RET is on the upper surface of the zoom demand body 21.
(Hereinafter referred to as V / R) changeover slide switch 22, V /
An R instruction lamp 23 and a V / R combined switch 24 are arranged in parallel, and a V / R combined switch 25 is provided on the lower surface of the zoom demand main body 21. A connector cable 26 is connected to the zoom demand body 21.

FIG. 3 is a circuit diagram of the zoom demand main body 21. The V / R combined switches 24 and 25 are the switch 2
It is connected via 7 and 28 to a connector cable 26 having a VTR terminal 29 and a RET terminal 30.

In use, the V / R combined switch 24 is used as a VTR switch and the V / R combined switch 25 is set to RET.
In the case of using the switch, the photographer slides the V / R switching slide switch 22 in the direction of the switch 22A to turn on the switch 27. When the switch 27 is turned on, the V / R combined switch 24 is connected to the VTR terminal 29, and the V / R combined switch 25 is connected to the RET terminal 30. At the same time, the V / R instruction lamp 23 lights the VTR character.

Next, when the V / R combined switch 24 is the RET switch and the V / R combined switch 25 is the VTR switch, the cameraman slides the V / R changeover slide switch 22 in the direction of the switch 22B, Switch 2
Turn 8 on. When the switch 28 is turned on, the V / R combined switch 24 is connected to the RET terminal 30 and the V / R combined switch 25 is connected to the VTR terminal 29. At the same time, the V / R instruction lamp 23 lights the letters RET.

In this way, the cameraman can freely switch the V / R combined switches 24 and 25 to the VTR switch and the RET switch by sliding the V / R switching slide switch 22.

FIG. 4 is a plan view of the second embodiment, FIG. 5 is a side view, and the same reference numerals as those in FIGS. 1 and 2 denote the same members. On the upper surface of the zoom demand main body 21, a V / R changeover push type switch 31 and a V / R instruction lamp 32 are provided. On the V / R instruction lamp 32, VTR characters are displayed in blue and red characters are RET. Is displayed. 6 is a circuit diagram for explaining the circuit inside the zoom demand main body 21. The V / R combined switches 24 and 25 are signal conversion circuits 33.
It is connected to the VTR terminal 29 and the RET terminal 30 via.

In use, the V / R combined switch 24 is used as a VTR switch, and the V / R combined switch 25 is set to RET.
In the case of using the switch, when the cameraman presses the V / R switching push-type switch 31, the signal conversion circuit 33 connects the V / R combined switch 24 to the VTR terminal 29,
The V / R combined switch 25 is connected to the RET terminal 30. At the same time, the V / R combined switch 24 lights up in blue and the V / R combined switch 25 lights up in red.

Next, when the V / R combined switch 24 is used as a RET switch and the V / R combined switch 25 is used as a VTR switch, when the cameraman pushes the V / R switch push type switch 31 again to disconnect the switch, a signal is output. The conversion circuit 33 causes the V / R dual-use switch 24 to change the RET terminal 30.
And the V / R dual-purpose switch 25 is connected to the VTR terminal 29.
Connected to. At the same time, the V / R combined switch 24 lights in red and the V / R combined switch 25 lights in blue.

In this way, the cameraman can freely switch the V / R dual-use switches 24 and 25 to the VTR switch and the RET switch by pressing the V / R switch push type switch 31, and each switch can be selected depending on the color. You can check the function of.

FIG. 7 is a block circuit diagram of the third embodiment and shows a drive control circuit of the filter disk device. The connector 41 is connected to the electric circuit of the TV camera, and the output of the connector 41 is + 2V, + 5V, +8.
It is connected to a reference power supply generation circuit 42 that outputs a voltage of V. Further, the command signals S6 and S7 of the connector 41 are directly connected to the coincidence signal generating circuit 43 and the ROMIC 44, and the command signal S8 is connected to the coincidence signal generating circuit 43 and the ROMIC 44 via the switch 45 having terminals 45a and 45b. There is.

Further, a sensor 46 for detecting which filter is mounted on the optical axis of the photographing system is attached to the filter disc. Position signal from sensor 46
S9, S10 and S11 are directly connected to the coincidence signal generating circuit 43 and the latch circuit 47, and the signal S12 is connected to the coincidence signal generating circuit 43 and the latch circuit 47 via the switch 48 having terminals 48a and 48b. At this time, switch 4
5 and the switch 48 are interlocked and the switch 45 is connected to the terminal 45a.
When the switch 48 is connected to the terminal 48a, the switch 48 is connected to the terminal 48a, and when the switch 45 is connected to the terminal 45b, the switch 48 is connected to the terminal 48b. Latch circuit 4
The initial position signals S9 'to S12' of 7 are connected to the ROMIC 44, and the position signal S13 of the coincidence signal generating circuit 43 is connected to the latch circuit 47 and the analog switch 49. The + 5V output of the reference power supply generation circuit 42 is connected to the analog switch 49.

Further, the rotation direction signal S14 of the ROMIC 44
Is connected to the analog switch 50 to which the + 2V and + 8V outputs of the reference power supply generation circuit 42 are connected, and the analog signal S15 of the analog switch 50 is converted to the analog switch 49.
It is connected to the. Further, the analog signal S16 of the analog switch 49 is connected via an amplifier 51, 52 to a motor 54 which drives a filter disk 53, and the filter disk 53 has a plurality of filters 55.

When using a four-disk filter disk, the switch 45 is first connected to the terminal 45b to disconnect the position signal S8. At this time, the switch 48 is also the terminal 48
The command signal S12 is also disconnected and the command signal S12 is disconnected, and the command signals S6 and S7 from the television camera and the signals S9 to S11 from the sensor 46 are input to the coincidence signal generation circuit 43. The coincidence signal generation circuit 43 compares the command signals S6 and S7 with the position signals S9 to S11,
If they match, the match signal S13 is output to the latch circuit 47 and the analog switch 49. When the coincidence signal S13 is input, the latch circuit 47 opens the gate and the position signals S9 to S1.
1 is ROMIC as it is as initial position signal S9 '~ S11'
It is output to 44. Further, the analog switch 49 has its internal terminal connected to the + 5V side, and sets the outputs to the amplifiers 51 and 52 to 0V.

Next, command signals S6 and S7 and position signals S9 to S11
If does not match with, the latch circuit 47 closes the gate, holds the initial state of the filter disk 53, and outputs the initial position signals S9 'to S11' to the ROMIC 44. The ROMIC 44 has position signals S6 and S7 and an initial position signal S
The direction in which the selected filter is mounted on the optical axis at the shortest distance is selected from 9'to S11 ', and the rotation direction signal S14 is output to the analog switch 50. Analog switch 50
Outputs to the analog switch 49 an analog signal S15 of either + 2V or + 8V corresponding to the rotation direction signal S14. The analog signal S15 is selected by the analog switch 49, the analog signal S15 is amplified by the amplifiers 51 and 52, and the motor 54 rotates the filter disk 53 in the shortest distance direction. When the filter disk 53 rotates to the position instructed by the command signals S6 and S7 from the television camera, the coincidence signal generation circuit 43 outputs the coincidence signal S13, so that the motor 54 stops the rotation of the filter disk 53.

Further, when using a filter disc having five sheets, the ROMIC 44 is first changed to one for a filter disc having five sheets. Next, the switch 45 and the switch 48 are connected to the terminals 45a and 48a, and the command signal S8 and the position signal S12 are output in addition to the four-element configuration. Therefore, the coincidence signal generation circuit 43 outputs the command signal S6 ...
S8 and position signals S9 to S12 are compared and a coincidence signal S13 is output. The latch circuit 47 latches the position signals S9 to S12 and outputs initial position signals S9 'to S12' to the ROMIC 44. The ROMIC 44 also calculates the shortest distance direction from the signals S6 to S12. After this, follow the same procedure as in the case of using the filter disc of four sheets, and the filter disc 5
Rotate 3 to the desired position. In this way, the same control board can be used for two types of filter disks. A similar effect can be obtained even if the ROMIC 44 is a PLD.

FIG. 8 is a block diagram of the fourth embodiment.
The output of U61 is output to the motor 63 via the motor driver 62.
And a motor 63 rotationally drives a ball screw 66 which linearly drives a lens 65 arranged on the linear scale 64. Further, the lens 65 is provided with a detection switch 67 and a position detector 68, and the output of the position detector 68 is connected to the counter 69. Furthermore,
A mechanical end point detection switch 70 and an optical end point detection switch 71 are provided on the subject side on the counter 69, and a mechanical end point detection switch 72 is provided on the camera side.
An optical end point detection switch 73 is provided. A Z-phase 74 is formed in the center of the linear scale 64, and a switch control member 75 for turning on / off the detection switch 67 is provided above the ball screw 66.
As shown in FIG. 9, the stepped portion of the switch control member 75 extends above the Z phase 74. Further, a counter 69, an end point detection switch 70, an end point detection switch 71, an end point detection switch 72, an end point detection switch 73,
The output of the Z-phase 74 is connected to the CPU 61, and the CPU 61 can substitute a value in the counter 69. The lens 65 is, for example, as shown in FIG. 10, one of the lenses in the camera lens in which a front lens 65a, a variator lens 65b, a compensator lens 65c, a front relay lens 65d, and a rear relay lens 65e are sequentially arranged. There is. FIG. 11 is a block diagram of a drive system for driving such a plurality of lenses 65, 65 ', 65 ", respectively.

The moving direction of the lens 65 is the X axis,
The direction moving from the subject side to the camera side is + X direction,
The counter 69 counts in the positive direction when the lens 65 moves in the + X direction. CO is a value counted when the lens 65 moves between both mechanical ends, and the optical origin of the lens 65 is Z of the linear scale 64.
It is assumed that the phase exists at a position deviated from the phase 74 by α. Further, the stepped portion of the switch control member 75 does not actually completely match the Z phase 74 as shown in FIG. 9, and has an assembly error of ± δ or less as shown in FIG.

Generally, when the detection switch 67 is on, the Z phase 74 exists in the + X direction of the camera, and when the detection switch 67 is off, the Z phase 74 is in the camera −-.
It exists in the X direction. In addition, the end point detection switch 70,
Z phase 74 when any of 71, 72, 73 is on
The existence direction of is determined. However, due to assembly errors, etc.
As shown in FIG. 2, the step portion of the switch control member 75 is displaced from the upper side of the Z phase 74, so that the direction in which the Z phase 74 exists may not be determined. Therefore, it is possible to prevent the detection error of the Z phase 74 by driving the lens 65 from the initial position by δ in the + X direction and in the −X direction by δ within the allowable error.

A method of moving the lens 65 to the optical origin will be described with reference to the flow chart shown in FIG. 13. First, in step 201, clearing of the counter 69 by the Z phase 74 is permitted, and in step 202, the end point detection switch 70. , 71 is turned on. When any of the switches is turned on, the lens 65 is moved to the subject side, so that the Z phase 74 of the linear scale 64 exists in the + X direction of the lens 65. In this case, the process proceeds to step 203, where the CPU 61 causes the counter 69 to
CO is set and the lens 65 is driven in the + X direction. Further, in step 204, the Z phase 74 is detected, and the Z phase 74 is detected.
Is detected, the count value of the counter 69 becomes 0,
Since the count value changes to a positive value when the counting is further continued, the CPU 61 drives the lens 65 while monitoring the count value of the counter 69.

When (count value) ≧ 0 and the Z phase 74 is detected, the CPU 61 stops the lens 65 in step 205. Assuming that the count value of the counter 69 at this time is CC, in step 206, the counter 69 by the Z phase 74 is
After prohibiting the clearing of, the remaining (α-
CC) only by driving the lens 65,
Moves to the optical origin. Finally, in step 208, the counter 69 is preset with a counter value corresponding to the optical origin, and the origin finding of the lens 65 is completed.

If the end point detection switches 70 and 71 are off in step 202, it is checked in step 209 whether either of the end point detection switches 72 and 73 is on. If any of the switches is on, the lens 65 has moved to the camera side, so the linear scale 6
The Z phase 74 of No. 4 exists in the −X direction of the lens 65. Therefore, in step 210, set + CO to the counter 69,
The lens 65 is driven in the −X direction. Further, step 21
In the case of 1, the Z phase 74 is detected. When the Z phase 74 is detected, the count value of the counter 69 becomes 0, and when the counting is continued, the count value changes to a negative value.
1 drives the lens 65 while monitoring the count value of the counter 69. (Count value) ≦ 0 and Z phase 74
If is detected, the lens 65 is stopped from the CPU 61 in step 205. After stopping, in step 206, Z phase 74
After prohibiting the clearing of the counter 69 by means of, the optical origin search is performed from step 207 as in the case described above.

At step 202, the end point detection switch 70,
If both 71 are off, the state of the end point detection switches 72 and 73 is checked in step 209, and if both are off, the counter 69 is set to -CO in step 212.
Is set, the lens 65 is driven by δ in the + X direction and then stopped, and it is checked in step 213 by the count value CC of the counter 69 whether or not the Z phase 74 is detected.
If the count value CC satisfies CC ≧ 0, the Z phase 74 is detected, so the routine proceeds to step 206, where step 206
After prohibiting the clearing of the counter 69 by the Z-phase 74 at step 207, the lens 65 is driven from the step 207 to the optical origin in the same manner as described above. If either of the end point detection switches 73 and 74 is turned on in step 209, the process proceeds to step 210, and it is checked in step 211 whether the Z phase 74 is detected while driving the lens 65 in the -X direction. When the Z phase 74 is detected, step 20
Go to 5.

If CC <0 in step 213, the Z phase 74 is not detected, so CO is set in the counter 69 in step 214, the lens 65 is driven by 2 · δ in the −X direction, and then stopped. Let Next, in step 215, it is checked whether or not the Z phase 74 is detected by the count value CC of the counter 69. If the count value CC satisfies CC ≦ 0, the Z phase 74 has been detected, so step 20
After the clearing of the counter 69 by the Z-phase 74 is prohibited in step 6, the lens 65 may be driven to the optical origin in step 207.

Further, if CC> 0 in step 215, the Z phase 74 is not detected, and therefore step 216
The on / off state of the detection switch 67 is checked with. When the detection switch 67 is on, the Z-phase 74 exists in the −X direction because the lens 65 is on the camera side. Therefore, in step 210, similarly to the above, the optical origin finding is completed. If the detection switch 67 is off in step 216, the lens 65 is on the subject side, and therefore the Z phase 74 exists in the + X direction. Therefore, from step 203, the optical origin finding is completed in the same manner as in the above case. The camera lens can be initialized by performing the above operation for the required number of lenses. When there are a plurality of lenses, it is possible to individually drive the lenses to the initial position or simultaneously drive the plurality of lenses to the initial position.

A photo coupler or a reflection type photo sensor may be used in place of the switch, and the switch on / off combination can be performed by other methods. Also,
Although the method of checking the value of the counter 69 is used to detect the Z phase 74, it is also possible to input the output of the Z phase 74 to the interrupt terminal of the CPU 61 and perform the detection by interruption. Further, the output of the Z-phase 74 is input to the port of the CPU 61 for detection, and the output of the Z-phase 74 is D flipped.
It is also possible to detect the Z phase 74 by inputting it to the port of the CPU 61 through a latch such as a flop.

FIG. 14 shows a fifth embodiment, which is a lens 65.
By adding two or more existence switches,
It is possible to narrow the area for driving the lens 65 in the X direction. For example, if there are two switches,
Describing using 4, above the linear scale 64,
Detection switches 76 and 77 indicating the position of the lens 65 are provided and turned on / off as shown in FIG. Here, "1" is turned on and "0" is turned off. As a result, depending on the position of the lens 65, the detection switches 76, 77
The on / off combination of is determined. For example, (0,
1) represents a state in which the switch 76 is off and the switch 77 is on.

In the case of the lens position state (0, 0), since the Z phase 74 exists in the + X direction with respect to the position of the lens 65, it is not necessary to detect the Z phase 74 within the allowable error range first. , Z immediately while driving the lens 65 in the + X direction
It suffices to detect the phase 74. Similarly, in the case of the lens position state (0, 1), the Z phase is 7 with respect to the position of the lens 65.
Since 4 exists in the −X direction, it is not necessary to first detect the Z phase 74 within the allowable error range, but it is sufficient to immediately detect the Z phase while driving the lens in the −X direction.

In the case of the combination of the lens position states (0,1) and (1,1), it is necessary to first detect the Z phase 74 within the allowable error range, and if it cannot be detected, the lens position state ( In the case of 1, 1), the lens position state (0,
In 1), the lens 65 is driven by ± δ in the −X direction, and Z
It suffices to detect the phase 74. In this way, it becomes possible to perform optical origin finding at a higher speed than in the fourth embodiment.

Here, the on / off range of the switch does not need to be evenly allocated to the drive region, and the range shown in FIG.
As shown in FIG. 5, by forming the detection switch 76 to be narrower than in the case of evenly allocating the detection switch 76, the area of the linear scale 64 for detecting the Z phase 74 becomes narrower.
4 can be detected.

FIG. 16 is a front view of the sixth embodiment, and FIG. 17 is a side view. Two filter disks 81 and 82 are arranged in parallel, and the filter disks 81 and 82 are filters 81a to 81d and 82a to respectively. It has 82d. A gear 84 having a pulse plate 83 and a gear 86 having a cylindrical ultrasonic motor 85 are arranged at the edge of the filter disk 81. Similarly, a gear 88 having a pulse plate 87 and a gear 90 provided with a cylindrical ultrasonic motor 89 are arranged at the edge of the filter disk 82. Furthermore, on the surfaces where the filter disks 81 and 82 do not face each other, the reflective photosensor 91,
92, and encoder-type transmissive photosensors 93, 94 for detecting the rotation amounts of the pulse plates 83, 87.

When the filter disk drive circuit (not shown) is turned on, the ultrasonic motors 85 and 89 are energized until the reflection type photosensors 91 and 92 react, and the gear 86,
The rotational force of 90 is transmitted to the filter disks 81 and 82,
The reference filter 81a is arranged on the optical axis. next,
For example, when a filter position command signal for the filter 81c or the like is input to the filter disk drive circuit, the ultrasonic motors 85, 8 are counted until the transmission photosensors 93, 94 count the preset number of pulses, such as 100.
9, and a desired filter is arranged on the optical axis by the gears 86 and 90.

By such position detection of the encoder system, rotation control in both left and right directions, which is impossible with the position detection of the potentiometer system, becomes possible. In the sixth embodiment, the two-disk filter disk device has been described. However, in FIG. 16, for example, the filter disk 81, the pulse plate 83, the ultrasonic motor 85, the gear 86, the reflection type photo sensor 91, and the transmission type photo sensor. By using only 93, it is possible to manufacture a filter disk device having a single sheet.

FIG. 18 is a front view of the seventh embodiment, FIG. 19 is a side view, and the same reference numerals as those in FIGS. 16 and 17 denote the same members. Idler gears 101 and 102 are provided at the center of the filter disc 81 and the filter disc 82, and ultrasonic motors 85 and 89 and gears 86 and 90 are provided at the edges of the idler gears 101 and 102.

Even with this structure, the same effect as that of the sixth embodiment can be obtained. Further, by constructing the filter disc device with only the filter disc 81, the ultrasonic motor 85, the gear 86, and the idler gear 101, it is possible to manufacture a filter disc device having one sheet.

FIG. 20 is a block diagram of the eighth embodiment. The outputs of the focal length setting unit 111 such as a zoom lens, the object distance setting unit 112 such as a focus demand, and the control unit gain setting member 113 are sent to the calculation unit 114. Connected, computing unit 114
The outputs of are connected to the amplifiers 115a to 115c, respectively. In addition, the outputs of the amplification units 115a to 115c are actuators 117 that drive the lenses 116a to 116c.
a to 117c, and the amplification units 115a to 115c
Outputs of position detectors 118a to 118c for detecting the positions of the lenses 116a to 116c are connected to 15c, respectively.

The calculation unit 114 calculates predetermined positions of the lenses 116a to 116c based on the state quantities such as the focal length and the object distance output from the focal length setting unit 111 and the object distance setting unit 112, and the amplification unit 115a. To 115c. Further, the control unit gain setting member 113 changes the respective state quantities when the normal zoom lens is used and when adjusting the flange back and the like, and outputs it to the arithmetic unit 114. The calculation unit 114 outputs a signal for setting the gain of the amplification units 115a to 115c in each state to a predetermined value due to the difference in the state quantity. With these inputs, the amplification units 115a to 115c appropriately set the gains when the normal zoom lens is used and during adjustment, and the predetermined position states of the lenses 116a to 116c input from the calculation unit 114 and the position detection unit 118a. The difference in the actual positions of the lenses 116a to 116c detected by -118c is amplified and output to the actuators 117a to 117c to control the lenses 116a to 116c.

At this time, the gain value set in the amplifiers 115a to 115c is set so that the gain value at the time of adjustment is larger than the gain value at the time of using the normal zoom lens. Therefore, in the control of the minute position required at the time of adjustment, the change in the state quantity output to the amplification units 115a to 115c becomes small, and the influence of mechanical resonance excited by the input is obtained even if the gain is somewhat high. Is small, and the stability of the system can be sufficiently secured. Therefore, the gain can be made higher during adjustment than when a zoom lens is used, and the influence of non-linear elements such as dead zones and friction of the actuators 117a to 117c, which are problems in controlling minute positions, can be reduced. .

In the eighth embodiment, the state quantity output from the control unit gain setting member 113 is input to the calculation unit 114, but this output is directly amplified by the amplification units 115a to 115a.
The same effect can be obtained by connecting to the member 5c and setting the gain. Further, although the outputs of the position detection units 118a to 118c were input to the amplification units 115a to 115c, the outputs are directly input to the calculation unit 114 to set the gain in the calculation unit 114 and a predetermined lens position of the lens group. , The actual lens position and its difference are calculated, and the amplification units 115a to 11a
It may be output to 5c.

[0075]

As described above, in the television camera device according to the first aspect of the present invention, when the handy camera is used while being fixed to a tripod or the like, each of the zoom demand bodies equipped with the VTR switch and the RET switch is equipped with By providing a switch for switching the function of the switch, the cameraman can freely set the switch according to his / her preference, frequency of use, etc., so that the operation performance can be improved.

Further, in the television camera device according to the second aspect of the present invention, the ROMIC is used in the rotation direction determination circuit section, so that the control circuit can be downsized while maintaining the functions and characteristics of the conventional asynchronous logic circuit, and the same structure can be achieved. The control board can easily cope with the specification change of the filter disk.

In the television camera device according to the third aspect of the invention, first, the lens is driven in the ± X direction from the initial position by the allowable assembly error or more, and when the Z phase cannot be detected, the Z phase detection direction switch is used to drive the lens in the driving direction. By determining, the Z phase can be detected at high speed.

In the television camera device according to the fourth aspect of the present invention, a conventional ultrasonic filter disk is used by using a cylindrical ultrasonic motor as an electric drive source of the filter disk device and a pulse encoder for detecting the position of the filter disk. In addition, the drive unit can be made smaller and lighter, and the cost can be reduced.
And it is possible to achieve low noise at the same time.

In the television camera device according to the fifth aspect of the present invention, the gain of the control member at the time of adjusting the flange back or the like is set to be larger than that at the time of normal use, so that a non-linear element is used at the time of fine position control at the time of adjusting. Can reduce the effect of, and maintain the stability of the system during normal use. Further, since the mechanical adjustment is performed electrically, a mechanical mechanism for the adjustment can be omitted, and the zoom lens can have high performance, small size, and light weight.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment.

FIG. 2 is a side view.

FIG. 3 is a circuit diagram in the main body of Sum Demand.

FIG. 4 is a plan view of the second embodiment.

FIG. 5 is a side view.

FIG. 6 is a circuit diagram in the main body of Sum Demand.

FIG. 7 is a drive control circuit diagram of a third embodiment.

FIG. 8 is a configuration diagram of a fourth embodiment.

FIG. 9 is a side view of a switch control member.

FIG. 10 is a configuration diagram of a lens.

FIG. 11 is a configuration diagram of a drive system of a plurality of lenses.

FIG. 12 is an explanatory diagram when the switch control member is displaced during assembly.

FIG. 13 is a flowchart of origin alignment.

FIG. 14 is an explanatory diagram of the fifth embodiment.

FIG. 15 is an operation explanatory view.

FIG. 16 is a front view of the sixth embodiment.

FIG. 17 is a side view.

FIG. 18 is a front view of the seventh embodiment.

FIG. 19 is a side view.

FIG. 20 is a configuration diagram of an eighth embodiment.

FIG. 21 is a side view of a conventional zoom demand.

FIG. 22 is a drive control circuit diagram of a conventional example.

FIG. 23 is a circuit diagram of a conventional shortest distance rotation direction generation circuit.

FIG. 24 is a front view of a conventional filter disk device.

FIG. 25 is a side view.

[Explanation of symbols]

 21 Zoom Demand Main Unit 22 V / R Changeover Slide Switch 23 V / R Indicator Lamp 24 V / R Combined Switch 25 V / R Combined Switch 43 Matching Signal Generation Circuit 44 ROMIC 45, 48 Switch 54, 81, 82 Filter Disk 65, 116a , 116b, 116c lens 67, 76, 77 detection switch 68, 118a, 118b, 118c position detector 69 counter 70, 71, 72, 73 end point detection switch 74 Z phase 75 switch control member 83, 87 transmissive photosensor 84, 88 pulse plate 85, 89 ultrasonic motor 86, 90 gear 91, 92 reflective photo sensor 101, 102 idler gear 113 control unit gain setting unit 114 arithmetic unit 115a, 115b, 115c amplifying unit 117a, 117b, 117c Actuator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Takashi Takahashi, 53 Imaiue-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Canon Inc., Kosugi Plant (72) Inventor, Shigeru Kawashima 53, Imaiue-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Canon Kosugi Plant Co., Ltd. (72) Inventor Joji Imura 53 Imaiue-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Canon Inc. (72) Inventor Kenichi Kumazawa 53 Imaiue-cho, Nakahara-ku, Kanagawa Prefecture Canon Inc. Kosugi Plant (72) Inventor Junichi Kasuya 53 Imaiuemachi, Nakahara-ku, Kawasaki-shi, Kanagawa Canon Inc. Kosugi Plant

Claims (11)

[Claims] 1. A television camera characterized in that two switches provided on a zoom demand for sending a shooting operation signal to a shooting system can be freely switched to both a VTR switch and a RET switch. apparatus. 2. A filter disk device having a plurality of filters is provided in a part of an imaging system, and a filter disk device for inserting a predetermined filter into an optical path of the imaging system by rotating the filter disk is provided. A television camera device characterized in that the distance direction discriminating circuit is an asynchronous logic circuit using a ROMIC, and the predetermined filter is rotated in the shortest distance direction and mounted in the optical path. 3. A lens position detecting means for detecting a lens position, comprising a lens system having a plurality of independently moving lens groups or a plurality of lens groups independently moving by focusing or zooming. A lens position reference means for indicating a division point of the lens position detection means in combination with the position detection means, and a lens position for dividing the lens position reference means and detecting each of them to determine the position of the lens position reference means. A television camera device provided with a reference determination means. 4. The television camera device according to claim 3, wherein a division point of the position detection means is made to coincide with the lens position reference means. 5. The television camera device according to claim 3, wherein the lens position detecting means is equally divided. 6. The television camera device according to claim 3, wherein the lens position detecting means is divided unevenly. 7. When the division point of the lens position detection means does not coincide with the lens position reference means due to an assembly error, the lens position reference determination means drives the lens by a distance equal to or more than an allowable range of the assembly error. The television camera device according to claim 3, wherein driving of the lens is stopped when the lens position reference means is detected within a distance of the allowable range or more. 8. A filter disc device, wherein one or more filter discs having a plurality of filters are provided in a part of a photographing system, and a predetermined filter is inserted into and removed from an optical path of the photographing system by a rotating operation of the filter disc. A television camera device comprising a cylindrical ultrasonic motor or a stepping motor as a drive source of the filter disc device. 9. The television camera device according to claim 8, wherein the position of the filter disc is detected using a pulse encoder. 10. A zoom lens group and a correction lens group that corrects an image plane variation caused by the movement of the zoom lens group, each independently moving on the optical axis by a control section and a driving section. A television camera device comprising a zoom lens for changing the magnification by allowing the gain of the control unit to be set from the outside. 11. The gain value of the control unit differs at least during normal use and during adjustment such as flange back,
The television camera device according to claim 10, wherein the gain value during the adjustment is set higher than the gain value during the normal use.